Remember, you can check Paschale Solemnitatis, the full document on this site, among many on the internet.
According to the CDWDS, the Lent observance begins not on Wednesday, but Sunday. What to do with those three days after Ash Wednesday? Practice?
23. The first Sunday of Lent marks the beginning of the annual Lenten observance. (Roman Missal, First Sunday of Lent, Opening Prayer and Prayer over the gifts) In the Mass of this Sunday there should be some distinctive elements which underline this important moment; e.g. the entrance procession with the litany of the saints. (Cf. Ceremonial of Bishops, 261) During the Mass of the first Sunday of Lent, the bishop should celebrate the rite of election in the cathedral or in some other church, as seems appropriate. (Cf. Ceremonial of Bishops, 400-410)
The Rite of Election during a First Sunday Mass? Almost always, Election is celebrated at a Liturgy of the Word. And the Litany of Saints on the first Sunday: who does that?